Silo-mold.



E. BLUMER.

SILO mom).

. APPLICATION FILED JULY 21, 1911. 1,039,085, Patented Sept. 24, 1912.

2 SHEETS-SHEET 1.

WITNESSES: [/VVENTOR E R I u m e. f"

. Attorney COLUMBIA PLANOURAPH c0., WASHINGTON. D. c.

E. BLUMBR.

SILO MOLD.

APPLICATION FILED JULY 21, 1911.

Patented Sept. 24, 1912.

2 SHEETS-SHEET 2.

O nC W1 TNESSES COLUMBIA PLANOCIRAPH cm. WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

EMIL BLUMEB, OF ST. JACOB, ILLINOIS.

SILO-MOLD.

Serial No. 639,795.

To all whom it may concern:

Be it known that I, EMIL BLUMER, a citizen of the United States,residing at St. Jacob, in the county of Madison and State of Illinois,have invented certain new and useful Improvements in Silo-Molds; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as .will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to molds and more particularly to molds forconstructing concrete silos or other circular structures.

An object of the invention is to provide a mold composed of sect-ionsand so formed that it is unnecessary to build a temporary scaffoldaround the silo while the latter is being built.

Another object is to provide a mold of the above stated character havingseveral sections adapted to be temporarily locked together to form acircle, each section being adapted to be unlocked from the remainingsections and moved upwardly to increase the height of the structure,and, another obj set is to provide an inner form and an outer form, bothforms being composed of sections, the sections of the inner form havingbracing rods 0r boards, across which planks may be placed for theworkmen to stand upon while drawing up the sections and placing them inposition and while pouring the plastic material between the inner andouter forms.

Other objects and advantages will be hereinafter set forth and pointedout in the specification and claim.

In the accompanying drawings which are made a part of this application,Figure 1 is an elevational view of a circular structure, partlycompleted, showing the workmen drawing up a lower section to place thesame in position upon an upper sect-ion. Fig. 2 is a detail view of thelock employed for locking together the outer sections. Fig. 3 shows thepreferred form of lock used to lock the sections of the inner formtogether. Fig. 4 is a sectional view on the line H of Fig. 2. Fig. 5 isa similar view on the line 5-5 of Fig; 2. Fig. 6 is a vertical sectionalview through a silo or other Referring to the drawings in which simi-Specification of Letters Patent. Patented Sept. 24, 1912. Applicationfiled July 21, 1911.

lar reference numerals designate corresponding parts throughout theseveral views, 1 indicates the sections of the inner form, said sectionscomprising plates curved from end to end and havin edges and upon theirlnner faces the strengthening angle irons 2, the purpose of which willbe readily apparent. Secured also to the inner face of each section 1 isthe secured at their vertical bracing-beam 3, to which are se cured thehorizontal brace rods 4:. The upper brace rod has one end secured nearan end of the section, while its opposite end is secured some distancefrom the opposite end of the section; and the lower brace rod 4 has oneend secured near the opposite end of the sect-ion while its opposite endis secured some distance from the first mentioned end of the section.Both brace rods, however,

are secured to the bracing-beam 3, which spaces said horizontalbrace-rods from the central portion of the curved section and the bracerods cross each other at their respective points of contact with thevertical brace-beam, and thereby form a rigid truss which braces thesection at its top and bottom and middle, and at points approximatelyequally spaced between its lateral ends and its middle.

All of the sections, except two, are provided with the eye straps 5secured at their vertical edges in such position that the eye openingsthereof will be one above another when the sections are placed end toend to allow the hinge pins 6 to be passed there- 3 a through when thesections are in position, the hinge pins 6 having their upper endssuitably bent to prevent the pins from dropping through the eye straps.The remaining two sections are provided upon their oppo- 1 site endswith eye straps 5 while their meeting ends are provided with cam locks,which will now be described.

The cam lock comprises a metallic plate -7 having secured thereto an arm8 adjacent adjacent vertical edge of the other section, &

near the angle iron 2 at this edge. The end of the plate 11, againstwhich the earn 9 en: gages, is suitably curved to accommodate the camwhen the arm 8 is in a substantially horizontal position. The pivotalmovement of the arm 8 is limited by means;

as just described, this locking mechanism serving to spread the sectionsat this point and force the hinged meeting ends of the sections tightlytogether.

The angleirons along the upper edges of E the sections 1, each havesecured thereto the 5 outwardly directed staples 14: which are adaptedto be engaged by the lower curved ends 15 of long suspending wires 16,which have their upper curved ends hooked over the upper edges of thesections directly 5 above. These staples '14 and suspending wires 16 arefor the purpose of suspending i one circle or ring of sections belowanother 3 and holding each lower section against the lower edge of thecircle directly above. The outer sections 17 are curved similarly to thel inner sections 1' and are of the same material, said sections17 alsohaving strengthen- 1- ing angle irons 18 along their edges. Thesesections are provided with eye straps 19,;

similar to the'eyestraps 5 of the'sections 1 and positioned along thevertical edges: of the sections 17 in a manner similarand Q positionscorresponding to that ofthe first eye straps. It might-be well to stateat this time that the eye straps 5 and 19 are. bentf so as to avoid theangle irons along the vertical edges of the sections. Hinge rods 20;

are passedthrough the alining openings of the eye straps 19 to hingedlyconnect the adjacent ends of the sections 17 together i the same as theinner sections 1. The meeting ends of two of the outer sections,however, are locked together by means of a strap '21 'secured to a block22 carried at the vertical edge of one of these ends and a locking arm23 pivoted to the plate 21 and having the cam 24 integral upon the underside of said arm and adjacent the pivot pin 25, by

means of which the arm is secured to thecarried by the strap 21, saidear 27 also serving to limit the movement of the locking arm 23. Thislocking mechanism, as will.

beseemdraws the outer sections closer together, the cam 24 workingwithin the U-shaped locking bar 26 and drawing the latter upon the strap21, on account of the cam 24; working between the legs of the "U-shaped.member and againstthe inner surface of the curved portion connectingthe legs. It will thus be seen that the outer form is also composed ofcurved sections which when locked together present a'circular form thesame as the innersections and it will be readily understood that anynumber of circular forms mav be'employed.

one above the other, for either the outer or inner forms.

Each circle of the outer form may be se cured to the circle above bymeans ofthe curved suspending wires 28, the lower turned ends of whichhook in the staples 29 carried upon the upper angle iron of eachsection, theupper ends ofthe suspending wires 28 belng also curved andsecured over the upper angle irons of the sections above, the suspendlngwires 28 of each section hooking in the eyes 29 of the sectionsimmediately therebelow. It will be seen that the lower sections of theouter form may be readily disconnected and raised upwardly to be placedon the sections of the top circle. 1

In employing this mold for constructing concrete silos or otherstructures of circular form, I prefer to employ enough sections of boththe inner and outer forms to use at leasttwo circles to the outer formand two to the inner 'form, the object of which will presently appear.The plastic material is then poured between the outer and inner forms,suitable rods 30 or other reinforcing means being previously positionedbetween the forms to strengthen and reinforce the finished structure.The sections are preferably placed so as to avoid the joints of onecircle being immediately above or below the H tions, are grasped andthese loose sections 4 are then drawn upwardly and placed in properposition upon the sections of the top circles, where they are againhinged together and locked to form circles above the original topcircles. be placed with their ends upon the brace rods 4 of the upperinner sections to pre sent a scaifold 01' platform, upon which theworkmen may stand to draw up the lower Suitable planks ,may i sectionsand place them upon the upper ones I and also while pouring theplasticmaterial between the inner and outer forms. It will be seen thatas the lower sections are moved upwardly and placed upon the uppersections, the planks may also be changed and moved upwardly and restedupon the brace rods 4 of the new upper circles of the inner form. Itwill thus be seen that this interchanging or moving upward of thesections to change the lower circle to the upper circle, may be repeatedtime after time as the height of the structure increases, it beingunderstood that these changes are made as rapidly as the material setsor hardens sufficiently to remove the lower circle and place itupon theupper circle, at which time the lower circle becomes the upper circle.

It will thus be seen that I have provided a mold for silos and othercircular structures, which may be readily employed without the necessityof building a scaffold and which will serve to mold a structure of anydesired height, said mold when not in use requiring only a small storagespace and one which is capable of being used an indefinite number oftimes.

When it is desired to form a window or door in the silo beingconstructed, the frame work for the window or door may be placed betweenthe inner and outer forms and the plastic material poured between theforms and around the frame, the latter being securely held in positionby the material, as will be understood.

It will be seen that as this mold is com posed of an extremely smallnumber of parts of simple formation, it may be manufactured and marketedat an extremely low price, placing the mold within the reach of allhaving use for such device. It will also be evident that this mold isstrong and durable and will be eflective in use.

What I claim is:

In a silo-mold consisting of a cylindrical outer form and a cylindricalinner form, a

number of curved plates forming the inner cylinder, each curved platebeing held in its curved formation by means of a vertical brace-bar atthe middle of the plate and extending from the bottom to the topthereof, an upper horizontal brace-rod having an end secured to theplate at a point near an EMIL BLUMER.

Witnesses:

KARL AEBIsoHER, FRANK P. SCHWARTZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

